15
3.2
The Digital Display
After the A75D(E) has completed start up the “AC ON” indicator on the front panel and either the “Float” or
“Equalize” indicator on the display membrane will be lit. The LCD will display the system DC output voltage and
DC output current. Pushing the
(UP) or
(DOWN) button changes the display. The following items can
be displayed:
Lamp Test
The Lamp test only tests the function of
the “AC ON” and “Alarm” LED. Press
mode to test these lamps, when lamp test
is displayed.
EQ Timer Mode
Shows what Equalize timer mode the
charger is currently in with a short
description listed on the second line
EQ Timer Setting
Shows what the Equalize timer is currently set
to.
Time until next Equalize
Shows a countdown to the next equalize
charge cycle.
When the unit is in Equalize Charging Mode,
the display will change to display the system
DC output voltage and DC output current, as
well as the time remaining in the current
Equalize charge cycle. Pushing the
(UP) or
(DOWN) button will change the display in
Equalize Mode as well.
3.3
Understanding the Alarms
Each alarm indication relay in the A75D(E), both the standard equipment and the optional card, is designed as
fail-safe. This means that under a complete system malfunction with all alarms relays de-energized, each alarm
will indicate its correct state. In addition each alarm has an LED indicator (mounted directly on the board) that
is illuminated when the relay coil is energized.
There are 10 LED indicators on the front panel of the A75D(E) located underneath the display membrane. The
“AC ON” indicator will be lit (in green) whenever power is provided to the unit. The remaining nine indicators
will light (in red) each under a specific alarm condition.
Figure 16 - Front Panel Indicators under normal operation
Figure 14 - LCD Showing System Outputs
(while in Float Charging Mode)
Figure 15 - LCD Showing System Outputs and EQ Timer
(while in Equalize Charging Mode)
